Grease-cup.



s. DAWSON; GREASE CUP. APPLICATION FILED JAN. 25,1915.

1,175,134.. Patented Mar. 14,1916.

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SIDNEY DAWSON, OF CHICAGO, ILLINOIS.

GREASE-CUP.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application filed January 25, 1915. Serial N 0. 4,139.

To all whom it may concern:

Be it known that I, SIDNEY DAWSON, a subject of the King of Great Britain, residing at Chicago, in the county of Cook and State of Illinois, United States of America, have invented a certain new and useful Improvement in Grease-Cups, of which the fol lowing is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to grease cups such as are provided upon machines for feeding grease to parts to be lubricated.

It is the object of my invention to provide a cup in which the major portion of the container is removable so that it is not necessary to take a cup of grease from one machine to another in order to replenish the cups, but on the other hand the containers themselves may be collected and filled at some convenient place and then taken back and placed upon the machine. This proves to be the more desirable form of cup and my invention is directed to certain features of improvement which have to do with the alining of the removable portion and the stationary portion of the cup when the removable portion is brought back to the machine. The parts are fitted together and if the, container is full of grease at the time when the removable part is to be threaded on the stationary part it is difficult to get the threads started. r

In order to carry out my invention I provide the removable portion of my cup with a central pocket and the stationary portion with a central stem adapted to take into the pocket so as to guide the former into proper engagement with the latter.

My invention is illustrated in the accompanying drawings in which- Figure 1 is a side elevational view of the cup assembled. Fig. 2 is a vertical sectional view taken on the plane of the line 2, 2, of Fig. 1. Fig. 3 is a horizontal sectional view taken on the plane of the line 3, 3, of Fig. 1, and Fig. 4 is a horizontal sectional view taken on the plane of the line 4, 4, of Fig. 2.

The stationary portion of the grease cup is in the form of a base 1 which is provided with threads 2 for engagement with the elements of machinery to which grease is to be supplied. The stem portion 3 of the container is provided with a polygonal surface for grasping the same by means of a wrench to tighten it in its desired position. The

stem has the axial passageway 4 which per mits the fiow of grease down to the elements to be oiled as will be described presently. Extending upwardly from the interior of the base portion 1, and secured thereto in any suitable manner in vertical alinement with the passageway 4, there is provided a stem 5 which is hollow and is provided with lateral perforations 6 at suitable intervals along its length for the purpose of allowing the grease in the container to enter and pass therethrough and to and through the passage 4.

The upper end of the base 1 is provided upon its outer periphery with threads 7 which are adapted to engage with the internal threads 8 of the cap 9. This cap 9 is thus removable and, as will be seen, constitutes the major portion of the containing compartment of the cup. By major portion, I do not necessarily mean the larger portion, but that of the main portion which is adapted to be filled periodically with grease. Extending centrally upward from the center of the cap 9 there is provided a part which forms the central pocket 12, and, as clearly shown in the drawings, the hollow stem 5, is adapted to pass upwardly into this pocket. The parts are of such respective sizes that when the cap 9 is placed upon the base 1, ready to be threaded thereon, the stem 5 is snugly fitted in the pocket 12 at the time that the bottom of the cap just touches the top of the base, thus, when a rotary movement is imparted to the cap, it is guided in its centralized position by means of the stem 5 and the threads 8 surely and accurately enter into engagement with the threads 7, without the rocking from side to side which would ordinarily ensue if inclependent guiding means were not provided. Since, when this operation takes place, the cup is adapted to be full of grease, it is clear that the simplicity with which the threads are made to engage becomes of importance, since it avoids any of the cut-and-try methods of starting the threads. After the cap has been properly threaded down upon the base, it is obvious that the continued rotation of the cap in the proper direction will force the grease down through the passageway 4.

The stem 5, in the particular embodiment 5.1

which I have herein shown, is made of polygonal cross sectlon so as to cooperate with a hairpin spring 10, which is held upon the inner side of the cap by means of a rivet 11. This engagement is illustrated in Fig. 3 and it will be seen, since the stem is made four-sided, that the cap will be latched relative to the base for every quarter turn of its movement. The cap 9 is provided with a rim 13 which is appropriately knurled and grooved for the reception of a wrench to provide for easy manipulation. The further downward movement of the cap upon the base 1 forces the grease down through the passageway 4: to the parts to be lubricated. Sufficient tension is put into the hairpin spring to hold the hollow stem against the ordinary shock and jarring of the machinery, it being assumed, of course, that this tension can readily be overcome by turning the cap by hand.

I claim as new and desire to secure by Letters Patent:

1. In a grease-cup, a base member, a cover member, said members being adapted to be threaded together, said cover member hav ing a pocket, said base member having a stem which projects into said pocket before threaded engagement takes place to guide said cover member into axial alinement with said base member.

2. In a grease-cup, a screw threaded cover member, a screw threaded base member, one of said members having a projection of a length greater than the depth of said cover member, the other of said members having a counter bore closely fitting about said projection to guide the screw threads on the cover and base members together, said projection being freely rotatable in said counter bore.

3. In combination, a base member, a cover member, said members having cooperating screw threads, a guiding stem secured to said base member and projecting above the threads on said base member by an amount slightly in excess of the depth of the cover 'member, said cover member having a guidmember therefor, said members being adapt- 9 ed to be threaded together, a central stem on one member and a pocket in the other, said stem being arranged to extend into said pocket before the threaded engagement takes place, said stem being freely rotatable in said pocket.

6. In a grease-cup, a base member, a cover member therefor, said members being adapted to be threaded together, a central polygonal stem on one member, and a pocket and a spring in the other member, said stem being arranged to extend into said pocket, in which it fits snugly before the threaded engagement takes place, and to engage said spring to form a latch.

7. In a grease-cup, a base member, a cover member therefor, said cover member being adapted to carry grease and to be threaded over said base member, a central stem on one member and a guiding bore in the other, said stem being arranged to extend into said guiding bore before the threaded engagement takes place.

In witness whereof, I hereunto subscribe my name this 23rd day of January A. 1).,

SIDNEY DAWSON. Witnesses:

LESLIE W. FRICKE, ERNEST W. RAPoLEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents,

. Washington, D. C. 

